Took my car to a dyno day (RR event) on the week end. The operator started to load the car and when on boost, all of the sudden the power cut down for a split second and kept doing this a couple of times during the pull, car never done this on other RR events. The operator rekoned is the haldex cutting in and out, i've seen a graph where the haldex makes more jagged line than what i've got, i think is throttle cut of some sort, the ESP was turned off when on the RR. My car is 05-00 build, so is my car been recalled by the factory to fit ESP or did it come with it? I'm asking this because i've heard storyes where a retrofitted ESP can never be turned off completelly or are just bolloks and problem is something else? Cheers Ross.